Abstract
Considering the importance of alternative fuels in IC engines for environment safety, compressed natural gas has been extensively employed in SI engines. However, scarce efforts have been made to investigate the effect of compressed natural gas on engine lubricant oil for a long duration. In this regard, a comprehensive analysis has been made on the engine performance, emissions, and lubricant oil conditions using gasoline ( G)92 and compressed natural gas at different operating conditions using reliable sampling methods. The key parameters of the engine performance like brake power and brake-specific energy consumption were investigated at 80% throttle opening within 1500–4500 range of r/min. For the sake of emission tests, speed was varied uniformly by varying the load at a constant throttle. Furthermore, the engine was run at high and low loads for lubricant oil comparison. Although compressed natural gas showed a decrease in brake-specific energy consumption (7.94%) and emissions content, ( G)92 performed relatively better in the case of brake power (39.93% increase). Moreover, a significant improvement was observed for wear debris, lubricant oil physiochemical characteristics, and additives depletion in the case of compressed natural gas than those of ( G)92. The contents of metallic particles were decreased by 23.58%, 36.25%, 42.42%, and 66.67% for iron, aluminum, copper, and lead, respectively, for compressed natural gas.
Highlights
Petroleum has been used as a primary fuel in the power generation and transportation sectors since the past century, leading to scarcity of the reserves and inflation of oil prices.[1,2] it has become a crucial problem to meet the rapidly growing demand for fossil fuels when their reserves are depleting at a very alarming rate
This study focuses on a bi-fuel engine performance characteristic, lubricant oil conditions, and emission contents using (G)[92] and compressed natural gas (CNG) under different operating conditions for a longer time interval
It is concluded that engine running on (G)[92] showed a 39.39% and 8.63% increase in brake power (BP) and brake-specific energy consumption (BSEC), respectively, than that of running on CNG
Summary
Petroleum has been used as a primary fuel in the power generation and transportation sectors since the past century, leading to scarcity of the reserves and inflation of oil prices.[1,2] it has become a crucial problem to meet the rapidly growing demand for fossil fuels when their reserves are depleting at a very alarming rate. Keywords Compressed natural gas, emission, brake-specific energy consumption, lubricant oil, performance additives, wear metals
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